mbox series

[ovs-dev,v5,00/13] Multiple conntrack performance improvements.

Message ID cover.1788272618.git.felix.huettner@digits.schwarz
Headers show
Series Multiple conntrack performance improvements. | expand

Message

Felix Huettner Sept. 1, 2026, 2:24 p.m. UTC 
Patch 1 just adds a performance test tool that is used throughout the
series.

Patches 2+3 optimize the cases of non-found connections. This is a
common case in combination with OVN for the reverse SNAT and reverse
DNAT stages. The performance test tool is not covering this specific
case. They where only tested on a real world setup.

Patch 5-8 optimizes all modifying operations by splitting the locks
for insert and deletions per zone. (In v3 this was a single patch)

Patches 9-13 optimize connection cleaning. The goal is to have a
predictable performance of the conntrack cleaning process independent if
there is only a single gigantic zone in use or if there are a lot of
small ones.

The final patch adds a news entry for the changes. It also contains the
performance improvements seen over the entire series.

Felix Huettner (13):
  test-conntrack: Benchmark for conntrack on tcp.
  conntrack: Do not always take insert locks.
  conntrack: Use cmap for expectations.
  conntrack: Add more coverage values for conntrack.
  conntrack: Extract ct zone to separate struct.
  conntrack: Add per zone lock.
  conntrack: Move zone limits to per zone struct.
  conntrack: Remove exp_lists for connection cleaning.
  conntrack: Clean zones partially.
  cmap: Support switching between cursor and position.
  conntrack: Use cmap cursor for iteration.
  conntrack: Batch conn deletions in a single zone.
  conntrack: Immediately continue cleaning under load.

 NEWS                    |   8 +
 lib/cmap.c              |  62 +++
 lib/cmap.h              |  30 ++
 lib/conntrack-private.h |  58 ++-
 lib/conntrack.c         | 866 ++++++++++++++++++++--------------------
 lib/conntrack.h         |   5 +-
 tests/library.at        |   2 +-
 tests/test-cmap.c       | 115 +++++-
 tests/test-conntrack.c  | 291 ++++++++++++++
 9 files changed, 968 insertions(+), 469 deletions(-)


base-commit: 1d4157643ca16ef8d84c8a27fe524aedb7b538d0